Nut-lock



(No Model.)

- J. D. CAMPBELL.-

. NUT LOOK. 7 No 515,111. Patented Feb. 20, 1894.

WITNESSES: W X9 QW INVENTOR 1r: NNNNNNNNNNNNNN em PPPPPPPPPPP v.

rectangular, parallel grooves.

ATENT rrrc JOHN D. CAMPBELL, OF BINGHAMTON, NE W YORK.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 515,111, dated February20, 1894.

Application filed October 9, 1893.

To all whom it may concern.-

Be it known that 1, JOHN D. CAMPBELL, a citizen of the United States,residing at Binghamton, in the county of Broome and State of New York,have invented a certain new and useful Improvement in Nut-Locks; and Ido hereby declare that the following is a full,clear, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, forming part thereof.

My invention relates to improvements in nut locking devices; and theobject of my invention is to provide a device by which a nut can besafely and effectively locked, and which can be cheaply manufactured. Iattain this object by means of the mechanism illustrated in theaccompanying drawings, in which Figure 1. is a view, in perspective, ofmy invention, showing the nut screwed upon its bolt and locked by itsspring catch. Fig. 2. is a view, in perspective, of the bolt, showingits rectangular, oblique grooves. Fig. 3. is a view, in cross section,of thebolt, showingits Fig. 4;. is a view, in perspective, of the nut,showing the depression in its face for the reception of the springcatch. Fig. 5. is a View, in perspective, of the spring catch. Fig. 6.is a perspective view of the back of the nut, showing one method ofsecuring the spring catch. Fig. 7. is a perspective view of the back ofthe nut, showing another method of securing the spring catch to the nut.

In Fig. 1., the letter represents the nut, which is screwed upon thethreaded bolt (a).

The letters (1)) (b) (b) show three longitudinal, rectangular groovesrunning through the thread of the bolt and extending a little below thebase of the thread, and situated equidistant from each other around thecircumference of the bolt. The spring catch (h), (g), (y), fits into thegroove (e e) and is secured to the nut at its end (h) (which is a littlewider than the stem) by driving it into the groove (e c) from the backof the nut. This spring catch is made of steel and is twice or threetimes as thick as the ring (y) as at the end (h) toward which itgradually tapers. The ring (y) has the opening (0) the latitudinalSerial No. 487,624. (No model.)

diameter of which corresponds with the diameter of the bolt (a), whileits longitudinal diameter is about as much greater as the depth of thegrooves (b) (b) (b). On the lower and inner part of this ring is anupright projection or pin (9 g) of,a size and shape necessary to engagewith the grooves (19) (b) (b). The depression or sunken shelf (2) aroundthe bolt hole of the nut, into which the ring (y) fits, is of such asize and shape as will allow the ring to work up and down in it, but notsidewise. The stem of this spring catch is normally about one quarter ofan inch above the top of the nut, so that when the nut is on the bolt,the pin (g g) will enter any one of the grooves (b) (b) (b) with whichit comes into contact, thus locking the nut. It will be seen that thenut is normally locked. When a wrench is placed on the nut to tighten orloosen it, the jaw of the wrench presses the spring down into the groove(e e), thus forcing down the ring (y), and releasing the pin (g g) fromthe groove (b) in the bolt, and allowing the nut to turn freely. Thewrench is then removed when the pin (9 g) is opposite a groove in thebolt, and the nut is locked. Even should the wrench be removed beforethe pin (9 g) reaches a groove, the nut could turn but a very slightdistance before the pin would slip into a groove and lock the nut.

In Fig. 2. is shown the bolt with the grooves (b) (b) (1)) runningdiagonally with the direction of the screw thread instead of at rightangles. The object of this is to leave the thread stronger than it mightbe with a straight groove. These grooves do not extend farther along thebolt than it is threaded.

The groove (6) and (e e,) Fig. 4., into which the spring catch is tofit, and which is pressed into the nut when made, is of uniform width onthe side of the nut, and is deep enough to admit of the spring beingpressed in below the surface of the nut.

The spring, Fig. 5., is cut from steel thicker at one end than at theother, the ring (y) being of the thickest part, and it is bent at rightangles at (00). The end (it) being cut slightly wider than the stem,when itis driven into the groove in the iron nut, binds and fastensitself. In a narrow nut, as in Fig. 6 the end of the spring is bent overthe back of the nut and secured by driving it down into the groovethere; but in a wider nut as shown in bolt hole, and the spring catchWhose shank Fig. 7 it is driven into the groove on the side fits overthe side of the nut, and whose oblong of the nut from the back. ringfits into the said countersink and encir- Having thus described mydevice, what I clesthebolt,thelongitudinal grooves of which I5 5 claimas my invention, and desire to secure it engages with its upright pin;as described Letters Patent for, is and for the purpose specified.

In a nut locking device, the combination To which I hereby subscribe.with a bolt longitudinally grooved to receive JOHN D. CAMPBELL. anupright pin carried by the ring of the Witnesses: I

to spring catch, of the grooved nut with an ob- ROBERT E. TOZER, longcountersink in its face surrounding the J. E. BOOKSTAVER.

